Laredo, Texas has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 17.6 °C (low) to 30.1 °C (high). Annual precipitation averages 494.8 Millimeters. Laredo is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.1 °C | 20.5 °C | 20.57 mm |
| February | 10.4 °C | 23.3 °C | 17.27 mm |
| March | 14.3 °C | 27.1 °C | 38.61 mm |
| April | 17.7 °C | 31.3 °C | 34.54 mm |
| May | 21.8 °C | 34.4 °C | 69.34 mm |
| June | 24.6 °C | 37.3 °C | 45.21 mm |
| July | 25 °C | 38.1 °C | 42.42 mm |
| August | 25.3 °C | 38.3 °C | 35.81 mm |
| September | 22.9 °C | 34.6 °C | 96.01 mm |
| October | 18.7 °C | 30.7 °C | 43.43 mm |
| November | 12.9 °C | 25.1 °C | 28.45 mm |
| December | 8.9 °C | 20.9 °C | 23.11 mm |
| Annual | 17.6 °C | 30.1 °C | 494.77 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |